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Use "smelters" in a sentence
"High-grade copper and nickel often are imported and bought by industrial users such as smelters and also by large trading companies."
"In developing countries, chemical mixtures in the vicinity of small-scale enterprises, such as smelters, mines, agricultural areas and toxic waste disposal sites, are often a human health hazard ."
"The shortages in electricity have already started to hurt big energy consumers such as smelters and metal miners."